Legal claims defining the scope of protection. Each claim is shown in both the original legal language and a plain English translation.
1. A method of wireless communication at a base station, comprising: performing a dual clear channel assessment (CCA) procedure for a frame prior to transmitting a transmission, wherein the dual CCA procedure comprises CCA followed by a first extended CCA (eCCA) when the CCA is unsuccessful; transmitting the transmission during the frame when at least one CCA procedure of the dual CCA procedure is successful; refraining from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful; and when the CCA and the first eCCA of the dual CCA procedure are unsuccessful: waiting until a next CCA location at a next frame boundary following the frame in which the CCA and the first eCCA are performed; and performing a second eCCA at the next CCA location prior to transmitting the transmission, wherein the second eCCA comprises a next eCCA following the dual CCA procedure and is performed at the next CCA location without performing a new CCA at the next CCA location.
This invention relates to wireless communication systems, specifically methods for improving channel access efficiency in unlicensed spectrum environments. The problem addressed is the need to reduce transmission delays and improve spectrum utilization while ensuring compliance with regulatory requirements for clear channel assessment (CCA) before transmission. The method involves a dual CCA procedure at a base station before transmitting a frame. The procedure first performs a standard CCA to check if the channel is clear. If the CCA fails, a first extended CCA (eCCA) is performed. If either the CCA or the first eCCA succeeds, the transmission proceeds during the current frame. If both fail, the base station refrains from transmitting in the current frame and waits until the next frame boundary. At the next frame boundary, a second eCCA is performed without repeating the initial CCA, allowing the base station to attempt transmission again with reduced delay. This approach optimizes channel access by minimizing unnecessary CCA repetitions while ensuring regulatory compliance and efficient spectrum usage. The method is particularly useful in dense wireless networks where contention for unlicensed spectrum is high.
2. The method of claim 1 , wherein performing the dual CCA procedure comprises: performing the CCA for a first period of time; and performing the first eCCA for a second period of time following the CCA, when the CCA is unsuccessful.
This invention relates to wireless communication systems, specifically to methods for improving channel access in shared spectrum environments. The problem addressed is the inefficiency of traditional clear channel assessment (CCA) procedures, which may fail to detect all potential interference sources, leading to collisions and degraded performance. The method involves a dual clear channel assessment (CCA) procedure to enhance channel access reliability. First, a standard CCA is performed for a defined period to detect energy-based interference. If the CCA is unsuccessful (i.e., the channel is deemed busy), an extended clear channel assessment (eCCA) is then performed for a second period. The eCCA is designed to detect additional interference sources that the initial CCA may have missed, such as signals with lower power or different modulation schemes. This two-step approach increases the likelihood of successful channel access by reducing the risk of collisions with undetected transmissions. The method ensures that wireless devices can more accurately determine channel availability before transmitting, improving spectrum utilization and reducing interference in shared environments. The dual CCA procedure is particularly useful in dense wireless networks where multiple devices compete for the same spectrum.
3. The method of claim 2 , wherein the second period of time is longer than the first period of time.
A system and method for optimizing data transmission in wireless communication networks addresses the challenge of efficiently managing data transfer while minimizing power consumption and latency. The invention involves a communication device that adjusts transmission intervals based on network conditions to improve reliability and energy efficiency. The device monitors signal quality and dynamically selects between a first and a second transmission period. The first period is shorter and used for high-priority or time-sensitive data, ensuring rapid delivery. The second period is longer and employed for non-critical data to conserve power and reduce network congestion. The system includes a controller that evaluates signal strength, interference levels, and data priority to determine the appropriate transmission interval. By extending the second period beyond the first, the device reduces unnecessary transmissions, prolongs battery life, and maintains stable communication links. The method also incorporates adaptive algorithms that adjust the intervals in real-time based on environmental changes, ensuring optimal performance under varying conditions. This approach enhances overall network efficiency while balancing speed and power consumption.
4. The method of claim 1 , further comprising: transmitting a reservation signal when the CCA is successful; and transmitting the transmission following the reservation signal.
A method for wireless communication involves a device performing a clear channel assessment (CCA) to determine if a communication channel is available for data transmission. The device monitors the channel to detect any ongoing transmissions or interference. If the CCA is successful, indicating the channel is clear, the device transmits a reservation signal to reserve the channel for its upcoming transmission. This reservation signal notifies other devices in the network that the channel will be occupied, preventing collisions. After transmitting the reservation signal, the device proceeds to send its data transmission. This method ensures efficient and collision-free communication in shared wireless environments by reserving the channel before data transmission. The reservation signal helps coordinate transmissions among multiple devices, reducing the likelihood of interference and improving overall network performance. The technique is particularly useful in wireless networks where multiple devices compete for access to the same communication channel.
5. The method of claim 1 , further comprising: transmitting a reservation signal when the first eCCA or the second eCCA is successful; and transmitting the transmission following the reservation signal.
This invention relates to wireless communication systems, specifically methods for improving channel access and transmission efficiency in shared spectrum environments. The problem addressed is the need for reliable and efficient channel access in scenarios where multiple devices compete for transmission opportunities, particularly in systems using enhanced clear channel assessment (eCCA) mechanisms. The method involves a device performing an eCCA procedure to determine if a communication channel is available for use. The eCCA may be a first type (first eCCA) or a second type (second eCCA), where the second eCCA may involve different parameters or criteria compared to the first. If either eCCA is successful, the device transmits a reservation signal to secure the channel. This reservation signal may include a preamble or other signaling that indicates the device's intent to transmit. Following the reservation signal, the device proceeds with the actual data transmission. This approach ensures that other devices in the network are aware of the ongoing transmission, reducing collisions and improving overall spectrum utilization. The method is particularly useful in dense wireless networks where contention for channel access is high.
6. The method of claim 1 , wherein a first transmission time corresponding to the CCA is independent of a first duration of the CCA and a second transmission time corresponding to the first eCCA or the second eCCA is based on a second duration of the first eCCA or the second eCCA.
This invention relates to wireless communication systems, specifically methods for managing transmission timing in environments where multiple devices share a communication channel. The problem addressed is ensuring efficient and fair channel access while minimizing collisions and maximizing throughput in shared wireless networks, such as Wi-Fi or other unlicensed spectrum systems. The method involves a clear channel assessment (CCA) mechanism that determines whether a communication channel is available for transmission. A first transmission time, associated with the CCA, is set independently of the duration of the CCA itself. This allows for flexible scheduling of transmissions without being constrained by the CCA's sensing period. Additionally, the method includes an enhanced clear channel assessment (eCCA) process, where a second transmission time is determined based on the duration of the eCCA. This means the transmission timing adapts dynamically to the length of the eCCA, allowing for more precise control over when transmissions occur. The eCCA may involve additional sensing or signaling steps to improve channel assessment accuracy. By decoupling the transmission timing from the CCA duration and dynamically adjusting it for eCCA, the method optimizes channel usage, reduces contention, and improves overall network performance.
7. The method of claim 1 , wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.
This invention relates to wireless communication systems, specifically improving channel access procedures in environments where multiple devices compete for transmission opportunities. The problem addressed is ensuring efficient and fair channel access while minimizing collisions, particularly in scenarios where a base station or access point needs to transmit data on a frequency band that may already be in use by other devices. The method involves a dual Clear Channel Assessment (CCA) procedure, which is triggered under specific conditions. The dual CCA procedure is performed when the base station has previously transmitted on the same frequency or before the base station transmits the first frame on that frequency. This ensures that the channel is properly assessed for occupancy before transmission, reducing the likelihood of collisions with other devices operating on the same frequency. The dual CCA procedure may involve multiple assessments of the channel to confirm its availability, enhancing reliability in crowded or contested wireless environments. The method is designed to work in systems where devices must adhere to regulatory or protocol requirements for channel access, such as those defined in standards like Wi-Fi or other wireless communication protocols. By implementing this procedure, the base station can more effectively manage channel access, improving overall network performance and reducing interference.
8. The method of claim 1 , wherein the wireless communication comprises enhanced machine type communication (eMTC).
This invention relates to wireless communication systems, specifically enhancing machine-type communication (MTC) for improved efficiency and reliability. The technology addresses challenges in low-power, low-bandwidth devices, such as IoT sensors, by optimizing communication protocols to reduce power consumption and latency while maintaining robust connectivity. The method involves using enhanced machine-type communication (eMTC), a variant of LTE designed for IoT applications, to support devices with limited processing capabilities and battery life. eMTC employs narrowband operation, extended discontinuous reception (eDRX), and power-saving modes to minimize energy usage while ensuring reliable data transmission. The system may also include techniques for handling interference, optimizing resource allocation, and supporting massive machine-type communication (mMTC) scenarios where numerous devices operate in the same network. By leveraging eMTC, the invention enables efficient communication for IoT devices in applications like smart metering, industrial automation, and remote monitoring, where low power and reliable connectivity are critical. The method may further integrate with other wireless standards or network architectures to enhance scalability and performance.
9. An apparatus for wireless communication at a base station comprising: means for performing a dual clear channel assessment (CCA) procedure for a frame prior to transmitting a transmission, wherein the dual CCA procedure comprises CCA followed by a first extended CCA (eCCA) when the CCA is unsuccessful; means for transmitting the transmission during the frame when at least one CCA procedure of the dual CCA procedure is successful; and means for refraining from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful, wherein when the CCA and the first eCCA of the dual CCA procedure are unsuccessful: the means for refraining waits until a next CCA location at a next frame boundary following the frame in which the CCA and the first eCCA are performed, and the means for performing a dual CCA procedure performs a second eCCA at the next CCA location prior to transmitting the transmission, wherein the second eCCA comprises a next eCCA following the dual CCA procedure and is performed at the next CCA location without performing a new CCA at the next CCA location.
This invention relates to wireless communication systems, specifically addressing the challenge of efficiently managing channel access in shared spectrum environments. The apparatus is designed for use at a base station and includes mechanisms to perform a dual clear channel assessment (CCA) procedure before transmitting a frame. The dual CCA procedure involves an initial CCA followed by a first extended CCA (eCCA) if the initial CCA fails. If either the initial CCA or the first eCCA succeeds, the apparatus transmits the frame. If both fail, the apparatus refrains from transmitting during the current frame and instead waits until the next frame boundary. At this next boundary, the apparatus performs a second eCCA without repeating the initial CCA. This second eCCA is the next in sequence following the dual CCA procedure and occurs at the next available CCA location. The system ensures efficient channel access by minimizing unnecessary CCA repetitions while maintaining compliance with regulatory requirements for shared spectrum usage. The apparatus optimizes transmission opportunities by leveraging extended CCA procedures only when necessary, reducing latency and improving spectral efficiency.
10. The apparatus of claim 9 , wherein the means for performing the dual CCA procedure performs the CCA for a first period of time and performs the first eCCA for a second period of time following the CCA, when the CCA is unsuccessful.
This invention relates to wireless communication systems, specifically to apparatuses and methods for performing dual clear channel assessment (CCA) procedures to improve channel access efficiency. The problem addressed is the need for reliable and efficient channel access in dense wireless networks where multiple devices compete for the same communication medium. Traditional CCA methods may fail to detect all potential interference sources, leading to collisions and reduced throughput. The apparatus includes a means for performing a dual CCA procedure, which involves two stages of channel assessment. First, a standard CCA is performed for a first period of time to detect energy levels and signal presence. If the CCA is unsuccessful (i.e., the channel is deemed busy or unavailable), a first enhanced CCA (eCCA) is then performed for a second period of time. The eCCA provides a more thorough assessment, potentially detecting weaker signals or interference that the initial CCA may have missed. This dual-stage approach reduces the likelihood of collisions by ensuring that the channel is truly available before transmission begins. The apparatus may also include means for adjusting the duration of the CCA and eCCA periods based on network conditions or predefined thresholds to optimize performance. This method enhances reliability in crowded wireless environments by combining quick initial checks with more detailed assessments when needed.
11. The apparatus of claim 10 , wherein the second period of time is longer than the first period of time.
The invention relates to an apparatus for managing time-based operations in a system, particularly addressing the need for efficient and adaptive timing control in processes where different phases require distinct durations. The apparatus includes a timing control module that regulates operations over two distinct periods of time, where the second period is longer than the first. This design allows for flexible adjustment of timing parameters to optimize performance, energy efficiency, or resource allocation. The apparatus may be used in systems requiring phased operations, such as data processing, power management, or industrial automation, where varying time intervals are necessary to achieve desired outcomes. By extending the second period relative to the first, the apparatus ensures that subsequent phases have sufficient time to complete their tasks, improving overall system reliability and efficiency. The timing control module dynamically adjusts these periods based on system conditions, ensuring adaptability to changing operational demands. This approach prevents premature termination of critical processes and enhances system responsiveness. The invention is particularly useful in environments where precise timing is essential, such as real-time computing, sensor networks, or automated control systems.
12. The apparatus of claim 9 , wherein the means for transmitting transmits a reservation signal when the CCA is successful and transmits the transmission following the reservation signal.
A wireless communication apparatus includes a clear channel assessment (CCA) module that evaluates the availability of a communication channel. If the CCA determines the channel is clear, the apparatus transmits a reservation signal to reserve the channel for an upcoming data transmission. After sending the reservation signal, the apparatus proceeds with the actual data transmission. This method ensures that other devices in the network are aware of the impending transmission, reducing the likelihood of collisions and improving communication efficiency. The apparatus may also include a backoff timer that delays transmission if the channel is busy, further enhancing reliability in shared wireless environments. The reservation signal may contain information about the duration of the upcoming transmission, allowing other devices to adjust their operations accordingly. This approach is particularly useful in dense wireless networks where multiple devices compete for channel access. The system may operate in various frequency bands and support different modulation schemes to adapt to different communication standards. The apparatus may also include error detection and correction mechanisms to ensure data integrity during transmission. By combining CCA, reservation signaling, and adaptive transmission techniques, the apparatus provides a robust solution for reliable wireless communication in contested environments.
13. The apparatus of claim 9 , wherein the means for transmitting transmits a reservation signal when the first eCCA or the second eCCA is successful and transmits the transmission following the reservation signal.
This invention relates to wireless communication systems, specifically to apparatuses and methods for enhanced clear channel assessment (eCCA) in shared spectrum environments. The problem addressed is the need for efficient and reliable channel access in scenarios where multiple devices compete for transmission opportunities, such as in unlicensed or shared spectrum bands. Traditional clear channel assessment (CCA) mechanisms may not adequately handle dynamic interference or varying channel conditions, leading to collisions or inefficient spectrum utilization. The apparatus includes a means for performing a first eCCA and a second eCCA, where the second eCCA is conducted if the first eCCA is unsuccessful. The first eCCA may involve a shorter or less stringent assessment, while the second eCCA may be more thorough. If either eCCA is successful, the apparatus transmits a reservation signal to secure the channel for an upcoming transmission. This reservation signal ensures that other devices detect the channel as occupied, reducing the likelihood of collisions. The actual data transmission follows the reservation signal, improving reliability and efficiency in shared spectrum access. The apparatus may also include means for adjusting the eCCA parameters based on channel conditions or network requirements, further optimizing performance. This approach enhances spectrum utilization while minimizing interference in dense wireless environments.
14. The apparatus of claim 9 , wherein a first transmission time corresponding to the CCA is independent of a first duration of the CCA and a second transmission time corresponding to the first eCCA or the second eCCA is based on a second duration of the first eCCA or the second eCCA.
The invention relates to wireless communication systems, specifically addressing transmission timing in Clear Channel Assessment (CCA) and extended CCA (eCCA) processes. The core problem involves optimizing transmission timing to improve channel access efficiency and reduce collisions in shared wireless spectrum environments. The apparatus implements a mechanism where the first transmission time for a CCA operation is determined independently of the duration of that CCA. This means the timing of when a device transmits after detecting a clear channel does not depend on how long the CCA was performed. In contrast, for extended CCA (eCCA) operations, the transmission time is dynamically adjusted based on the duration of the preceding eCCA. Specifically, the second transmission time for either the first or second eCCA is derived from the duration of the respective eCCA process. This ensures that devices wait longer before transmitting when the channel is busy for extended periods, reducing the likelihood of simultaneous transmissions and improving overall network performance. The solution leverages the relationship between channel occupancy duration and transmission timing to enhance coexistence in unlicensed spectrum environments, such as those used in Wi-Fi or other wireless standards. By decoupling the initial transmission timing from CCA duration while tying it to eCCA duration, the apparatus optimizes channel access fairness and efficiency.
15. The apparatus of claim 9 , wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.
16. The apparatus of claim 9 , wherein the wireless communication comprises enhanced machine type communication (eMTC).
17. An apparatus for wireless communication at a base station comprising: a memory; and at least one processor coupled to the memory and configured to: perform a dual clear channel assessment (CCA) procedure for a frame prior to transmitting a transmission, wherein the dual CCA procedure comprises CCA followed by a first extended CCA (eCCA) when the CCA is unsuccessful; transmit the transmission during the frame when at least one CCA procedure of the dual CCA procedure is successful; refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful; and when the CCA and the first eCCA of the dual CCA procedure are unsuccessful: wait until a next CCA location at a next frame boundary following the frame in which the CCA and the first eCCA are performed; and perform a second eCCA at the next CCA location prior to transmitting the transmission, wherein the second eCCA comprises a next eCCA following the dual CCA procedure and is performed at the next CCA location without performing a new CCA at the next CCA location.
18. The apparatus of claim 17 , wherein performing the dual CCA procedure comprises: performing the CCA for a first period of time; and performing the first eCCA for a second period of time following the CCA, when the CCA is unsuccessful.
19. The apparatus of claim 18 , wherein the second period of time is longer than the first period of time.
20. The apparatus of claim 17 , wherein the at least one processor is further configured to: transmit a reservation signal when the CCA is successful; and transmit the transmission following the reservation signal.
This invention relates to wireless communication systems, specifically addressing the challenge of efficient channel access and collision avoidance in shared communication environments. The apparatus includes at least one processor configured to perform clear channel assessment (CCA) to determine if a communication channel is available for use. If the CCA is successful, indicating the channel is free, the processor transmits a reservation signal to reserve the channel for an upcoming transmission. Following the reservation signal, the processor transmits the actual data or control signal. This method ensures that other devices in the network are aware of the impending transmission, reducing the likelihood of collisions and improving communication reliability. The reservation signal may include information such as the duration of the upcoming transmission, allowing other devices to defer their own transmissions accordingly. This approach is particularly useful in dense wireless networks where multiple devices compete for channel access, such as in Wi-Fi or IoT applications. The invention enhances channel utilization by minimizing idle periods and preventing overlapping transmissions, thereby improving overall network efficiency and throughput.
21. The apparatus of claim 17 , wherein the at least one processor is further configured to: transmit a reservation signal when the first eCCA or the second eCCA is successful; and transmit the transmission following the reservation signal.
This invention relates to wireless communication systems, specifically to methods for improving channel access and transmission efficiency in environments with multiple competing devices. The problem addressed is the need for reliable and efficient channel access in dense wireless networks where multiple devices may attempt to transmit simultaneously, leading to collisions and reduced throughput. The apparatus includes at least one processor configured to perform an enhanced clear channel assessment (eCCA) to determine if a communication channel is available for transmission. The eCCA may involve multiple sensing mechanisms, such as energy detection or signal detection, to assess channel availability. The processor is further configured to transmit a reservation signal when either a first or a second eCCA is successful, indicating that the channel is clear for transmission. This reservation signal serves to notify other devices in the network that the channel is being reserved, reducing the likelihood of collisions. Following the reservation signal, the apparatus transmits the intended data or control signal. The use of a reservation signal after a successful eCCA ensures that the channel is secured for the transmitting device, improving transmission reliability and reducing interference. This method is particularly useful in scenarios where multiple devices operate in close proximity, such as in IoT networks or dense Wi-Fi deployments. The invention enhances channel access efficiency by minimizing collisions and optimizing the use of available bandwidth.
22. The apparatus of claim 17 , wherein a first transmission time corresponding to the CCA is independent of a first duration of the CCA and a second transmission time corresponding to the first eCCA or the second eCCA is based on a second duration of the first eCCA or the second eCCA.
Wireless communication systems often require efficient channel access mechanisms to avoid collisions and ensure reliable data transmission. A key challenge is determining the timing for transmission attempts after performing clear channel assessment (CCA) or enhanced clear channel assessment (eCCA) procedures. Traditional methods may link transmission timing directly to the duration of the CCA or eCCA, which can lead to inefficiencies or delays. This invention addresses the problem by decoupling the transmission timing from the CCA duration while maintaining a dependency between transmission timing and eCCA duration. Specifically, the apparatus includes a first transmission time for CCA that operates independently of the CCA duration, allowing for more flexible scheduling. In contrast, a second transmission time for eCCA is determined based on the eCCA duration, ensuring that the timing aligns with the enhanced assessment process. This approach optimizes channel access by reducing unnecessary delays when using standard CCA while maintaining precise timing control for eCCA, which may involve more complex or variable assessment periods. The solution improves overall system efficiency by adapting transmission timing to the specific requirements of each assessment method.
23. The apparatus of claim 17 , wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.
24. The apparatus of claim 17 , wherein the wireless communication comprises enhanced machine type communication (eMTC).
This invention relates to wireless communication systems, specifically apparatuses designed to support enhanced machine type communication (eMTC). Efficient and reliable communication for machine-to-machine (M2M) devices is critical in applications like IoT, smart metering, and industrial automation, where devices often operate in challenging environments with limited power and connectivity. The apparatus includes a wireless communication module configured to establish and maintain connections with M2M devices, optimizing power consumption and network efficiency. The communication module supports eMTC, a low-power, wide-area technology tailored for M2M applications, enabling devices to transmit small data packets with extended battery life and improved coverage. The apparatus may also include processing components to manage data transmission, error correction, and network resource allocation, ensuring reliable communication even in low-signal areas. Additionally, the system may incorporate scheduling mechanisms to prioritize critical data and reduce latency, enhancing overall performance in M2M networks. The apparatus is designed to integrate seamlessly with existing wireless infrastructure while addressing the unique challenges of M2M communication, such as high device density and intermittent connectivity.
25. A non-transitory computer-readable medium storing computer executable code for wireless communication at a base station, comprising code to: perform a dual clear channel assessment (CCA) procedure for a frame prior to transmitting a transmission, wherein the dual CCA procedure comprises CCA followed by a first extended CCA (eCCA) when the CCA is unsuccessful; transmit the transmission during the frame when at least one CCA procedure of the dual CCA procedure is successful; refrain from transmitting during the frame when both CCA procedures of the dual CCA procedure are unsuccessful; and when the CCA and the first eCCA of the dual CCA procedure are unsuccessful: wait until a next CCA location at a next frame boundary following the frame in which the CCA and the first eCCA are performed; and perform a second eCCA at the next CCA location prior to transmitting the transmission, wherein the second eCCA comprises a next eCCA following the dual CCA procedure and is performed at the next CCA location without performing a new CCA at the next CCA location.
This invention relates to wireless communication systems, specifically improving channel access efficiency in unlicensed spectrum. The problem addressed is the need for reliable and efficient channel access in shared wireless environments where multiple devices compete for transmission opportunities. Existing clear channel assessment (CCA) methods may fail to detect all potential interference sources, leading to collisions or wasted transmission opportunities. The invention provides a method for wireless communication at a base station that uses a dual clear channel assessment (CCA) procedure before transmitting a frame. The dual CCA procedure includes an initial CCA followed by a first extended CCA (eCCA) if the initial CCA is unsuccessful. If either the initial CCA or the first eCCA is successful, the transmission proceeds during the current frame. If both are unsuccessful, the base station waits until the next frame boundary and performs a second eCCA at the next CCA location without repeating the initial CCA. This second eCCA is performed as the next eCCA in sequence after the dual CCA procedure, ensuring efficient use of channel access opportunities while minimizing collisions. The method avoids unnecessary retransmissions and improves spectral efficiency by dynamically adapting the CCA process based on channel conditions.
26. The non-transitory computer-readable medium of claim 25 , wherein performing the dual CCA procedure comprises: performing the CCA for a first period of time; and performing the first eCCA for a second period of time following the CCA, when the CCA is unsuccessful.
This invention relates to wireless communication systems, specifically to methods for improving channel access in shared spectrum environments. The problem addressed is the need for efficient and reliable channel access in scenarios where multiple devices compete for the same communication medium, such as in unlicensed or shared spectrum usage. Traditional clear channel assessment (CCA) mechanisms may fail to detect all potential interference sources, leading to collisions and degraded performance. The invention describes a dual clear channel assessment (CCA) procedure that enhances reliability by combining a standard CCA with an extended CCA (eCCA). The process involves first performing a standard CCA for a defined period to check for channel availability. If the standard CCA is unsuccessful (i.e., the channel is busy), the system then performs an extended CCA for a subsequent period. The extended CCA may use different detection thresholds or additional sensing techniques to better identify interference or hidden nodes that the initial CCA might have missed. This dual approach reduces the likelihood of collisions and improves overall spectrum utilization efficiency. The method is particularly useful in dense wireless networks where interference is a significant challenge. The invention may be implemented in wireless devices, base stations, or other network infrastructure components to optimize channel access in shared spectrum scenarios.
27. The non-transitory computer-readable medium of claim 26 , wherein the second period of time is longer than the first period of time.
A system and method for managing data processing operations in a computing environment involves controlling the execution of tasks based on time intervals. The invention addresses inefficiencies in task scheduling, particularly in scenarios where tasks must be processed at different rates or priorities. The system includes a processor and a non-transitory computer-readable medium storing instructions that, when executed, cause the processor to perform operations. These operations include initiating a first task during a first period of time and initiating a second task during a second period of time, where the second period is longer than the first. The tasks may involve data processing, system monitoring, or other computational operations. The system ensures that tasks are executed in a controlled manner, optimizing resource usage and preventing system overload. The invention is particularly useful in environments where tasks must be processed at different frequencies, such as in real-time data analysis or periodic system maintenance. The time-based control mechanism allows for flexible scheduling, improving overall system performance and reliability.
28. The non-transitory computer-readable medium of claim 25 , further comprising code to: transmit a reservation signal when the CCA is successful; and transmit the transmission following the reservation signal.
A system and method for wireless communication involves a device performing a clear channel assessment (CCA) to determine if a communication channel is available for data transmission. The device monitors the channel to detect any ongoing transmissions or interference. If the CCA is successful, indicating the channel is clear, the device transmits a reservation signal to reserve the channel for its upcoming transmission. This reservation signal informs other nearby devices that the channel is temporarily occupied, preventing collisions. After transmitting the reservation signal, the device proceeds to send its intended data transmission. This approach ensures reliable communication by reducing the likelihood of signal collisions and improving channel efficiency in shared wireless environments. The system may include additional features such as adjusting transmission parameters based on channel conditions or prioritizing certain types of data for faster transmission. The method is particularly useful in dense wireless networks where multiple devices compete for limited bandwidth.
29. The non-transitory computer-readable medium of claim 25 , further comprising code to: transmit a reservation signal when the first eCCA or the second eCCA is successful; and transmit the transmission following the reservation signal.
This invention relates to wireless communication systems, specifically methods for improving channel access and transmission efficiency in shared spectrum environments. The problem addressed is the need for reliable and efficient channel access mechanisms in scenarios where multiple devices compete for transmission opportunities, such as in unlicensed or shared spectrum bands. The invention describes a system where a device performs an enhanced clear channel assessment (eCCA) to determine if a communication channel is available for transmission. The eCCA process involves monitoring the channel for interference or ongoing transmissions and may include multiple stages or criteria to assess channel availability. The device may perform a first eCCA or a second eCCA, where the second eCCA could involve different parameters, thresholds, or procedures compared to the first. If either the first or second eCCA is successful (i.e., the channel is determined to be available), the device transmits a reservation signal to reserve the channel for its upcoming transmission. This reservation signal may be a short preamble, a synchronization signal, or another type of signal that indicates the device's intent to use the channel. Following the reservation signal, the device transmits its data or control information. The reservation signal helps prevent collisions by alerting other devices in the network to the impending transmission, thereby improving overall communication efficiency and reliability in shared spectrum environments.
30. The non-transitory computer-readable medium of claim 25 , wherein a first transmission time corresponding to the CCA procedure is independent of a first duration of the CCA and a second transmission time corresponding to the first eCCA or the second eCCA is based on a second duration of the first eCCA or the second eCCA.
Wireless communication systems often face challenges in efficiently managing channel access, particularly in environments with multiple devices competing for transmission opportunities. Existing channel access protocols, such as Clear Channel Assessment (CCA), may not always optimize transmission timing, leading to inefficiencies in spectrum utilization. This invention addresses these issues by introducing an enhanced channel access mechanism that decouples transmission timing from the duration of the CCA procedure. Specifically, the invention involves a non-transitory computer-readable medium storing instructions that, when executed, configure a device to perform a CCA procedure with a first transmission time that is independent of the CCA duration. Additionally, the device performs an enhanced CCA (eCCA) procedure, where the transmission time is determined based on the duration of the eCCA. This approach allows for more flexible and efficient channel access, improving spectrum utilization and reducing contention among devices. The invention also includes mechanisms to handle multiple eCCA procedures, ensuring that transmission timing is dynamically adjusted according to the specific eCCA duration, further optimizing performance in dense wireless networks.
31. The non-transitory computer-readable medium of claim 25 , wherein the dual CCA procedure is performed when the base station transmitted on a previous frame or prior to the base station transmitting the frame as a first frame on a frequency.
This invention relates to wireless communication systems, specifically improving channel access procedures in environments where multiple devices compete for transmission opportunities. The problem addressed is ensuring efficient and fair channel access while minimizing collisions, particularly in scenarios where a base station may need to transmit on a frequency that has been previously used or is being used for the first time. The solution involves a dual Clear Channel Assessment (CCA) procedure that evaluates channel conditions before transmission. The dual CCA procedure includes a first assessment to determine if the channel is idle and a second assessment to confirm the channel remains idle before proceeding with transmission. This dual-step approach reduces the likelihood of collisions by providing additional verification of channel availability. The procedure is particularly useful when the base station is transmitting on a frequency that was used in a previous frame or is being used for the first time, ensuring reliable and conflict-free communication. The invention is implemented via a non-transitory computer-readable medium containing instructions for executing the dual CCA procedure, which may be part of a broader set of instructions for managing wireless transmissions. The system dynamically adjusts channel access based on historical usage and current conditions, optimizing network performance in dense or contested environments.
32. The non-transitory computer-readable medium of claim 25 , wherein the wireless communication comprises enhanced machine type communication (eMTC).
The invention relates to wireless communication systems, specifically enhancing machine-type communication (MTC) for improved efficiency and reliability. MTC devices, such as sensors and IoT devices, often operate in challenging environments with limited power and connectivity. The invention addresses these challenges by implementing enhanced MTC (eMTC) to optimize data transmission, reduce power consumption, and improve signal reliability. The system includes a wireless communication module that processes data for transmission using eMTC protocols, which may involve adaptive modulation, error correction, and bandwidth management. The communication module may also support low-latency operations and prioritize critical data packets. Additionally, the system may include a power management module to extend battery life by dynamically adjusting transmission parameters based on network conditions. The invention ensures robust communication in low-coverage areas and supports large-scale deployments of MTC devices. The technical solution enhances existing MTC capabilities by integrating advanced features tailored for industrial, agricultural, and smart city applications.
33. The method of claim 1 , further comprising transmitting the transmission during the frame when the second eCCA is successful.
This invention relates to wireless communication systems, specifically methods for improving transmission efficiency in environments with multiple access points or devices. The problem addressed is the need to reduce collisions and improve channel access in dense wireless networks where multiple devices compete for the same communication medium. The method involves performing a first enhanced clear channel assessment (eCCA) to determine if a communication channel is available for transmission. If the first eCCA is unsuccessful, a second eCCA is performed to reassess channel availability. If the second eCCA is successful, a transmission is sent during the same frame. The method ensures that transmissions only occur when the channel is confirmed to be clear, reducing the likelihood of collisions and improving overall network performance. The invention may be used in wireless local area networks (WLANs), such as those operating under IEEE 802.11 standards, where multiple devices share the same frequency band. The technique helps optimize channel usage by dynamically assessing availability before transmission, particularly in high-density environments where contention for the medium is high.
34. The apparatus of claim 9 , wherein the means for transmitting transmits the transmission during the frame when the second eCCA is successful.
This invention relates to wireless communication systems, specifically to apparatuses that use enhanced clear channel assessment (eCCA) for transmitting data. The problem addressed is ensuring reliable and efficient data transmission in shared communication channels by improving the eCCA process. The apparatus includes a means for performing a first eCCA to determine if a channel is available for transmission. If the first eCCA fails, the apparatus performs a second eCCA to reassess channel availability. The apparatus also includes a means for transmitting data during a frame when the second eCCA is successful. This ensures that transmission only occurs when the channel is confirmed to be clear, reducing interference and improving communication reliability. The apparatus may also include means for adjusting transmission parameters based on the eCCA results, such as modifying transmission power or timing to optimize performance. The invention enhances wireless communication efficiency by dynamically assessing channel conditions and adapting transmission accordingly.
35. The apparatus of claim 17 , wherein the at least one processor is further configured to transmit the transmission during the frame when the second eCCA is successful.
This invention relates to wireless communication systems, specifically to apparatuses and methods for transmitting data during a frame when a second enhanced clear channel assessment (eCCA) is successful. The problem addressed is ensuring efficient and reliable data transmission in wireless networks by dynamically assessing channel availability before transmission. The apparatus includes at least one processor configured to perform a first eCCA to determine if a communication channel is available. If the first eCCA is unsuccessful, the processor performs a second eCCA to reassess the channel. If the second eCCA is successful, the processor transmits data during the frame. The apparatus may also include a transceiver for sending and receiving signals and a memory for storing instructions and data. The processor may further adjust transmission parameters, such as power or modulation, based on the eCCA results to optimize performance. The invention aims to reduce collisions and improve throughput in dense wireless environments by leveraging multiple channel assessments before transmission.
36. The non-transitory computer-readable medium of claim 25 , further comprising code to transmit the transmission during the frame when the second eCCA is successful.
A system and method for wireless communication involves a device performing an enhanced clear channel assessment (eCCA) to determine if a communication channel is available for data transmission. The device first performs a first eCCA to detect energy levels on the channel. If the first eCCA is unsuccessful, the device performs a second eCCA with different parameters, such as a lower detection threshold or a longer sensing period, to reassess channel availability. If the second eCCA is successful, the device transmits data during an allocated frame. The system improves channel utilization by dynamically adjusting sensing parameters to reduce false negatives in busy environments while avoiding unnecessary delays. The method ensures efficient spectrum sharing in dense wireless networks by leveraging multiple assessment stages before transmission. The non-transitory computer-readable medium stores code to execute this process, including transmitting data only when the second eCCA confirms channel availability. This approach enhances reliability in contested spectrum conditions.
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January 12, 2021
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